Currently, I Love Free Concerts is holding a contest to win a pair of tickets to Green Day's show on April 6th at the Mohegan Sun Arena in Connecticut.

From my understanding it looks like there is actually two ways to win tickets. The first is to retweet this Twitter post by @FreeConcertsNY and the second is to submit a form on I Love Free Concerts' website.

Correction: It looks like the only way to enter is to fill out the form on their website, sorry about that guys.